#include "DHT.h"

// Pin connected to DHT22 data pin
#define DHT_PIN 4
// DHT sensor type
#define DHT_TYPE DHT22
// Number of readings per interval (10 seconds / 200ms = 50 readings)
#define READINGS_PER_INTERVAL 10

// Initialize DHT sensor
DHT dht(DHT_PIN, DHT_TYPE);

// Variables to store temperature statistics
float minTemp = 1000.0; // Minimum temperature, initialized to a high value
float maxTemp = -1000.0; // Maximum temperature, initialized to a low value
float sumTemp = 0.0; // Sum of temperatures
float sqSumTemp = 0.0; // Sum of squares of temperatures
int count = 0; // Count of temperature readings

void setup() {
  // Initialize serial communication
  Serial.begin(9600);
  // Initialize DHT sensor
  dht.begin();
}

void loop() {
  // Read temperature from DHT sensor
  float temp = dht.readTemperature();

  // Print current temperature
  Serial.print("Temperature Value: ");
  Serial.println(temp);

  // Update temperature statistics
  minTemp = min(minTemp, temp);
  maxTemp = max(maxTemp, temp);
  sumTemp += temp;
  sqSumTemp += temp * temp;
  count++;

  // If enough readings have been taken for this interval
  if (count >= READINGS_PER_INTERVAL) {
    // Calculate average and standard deviation
    float avgTemp = sumTemp / count;
    float variance = (sqSumTemp / count) - (avgTemp * avgTemp);
    float stdDev = sqrt(variance);

    // Print temperature statistics
    Serial.print("Min Temperature: ");
    Serial.println(minTemp);
    Serial.print("Max Temperature: ");
    Serial.println(maxTemp);
    Serial.print("Average Temperature: ");
    Serial.println(avgTemp);
    Serial.print("Standard Deviation: ");
    Serial.println(stdDev);

    // Reset temperature statistics for next interval
    minTemp = 1000.0;
    maxTemp = -1000.0;
    sumTemp = 0.0;
    sqSumTemp = 0.0;
    count = 0;
  }

  // Wait before next reading
  delay(1000);
}